42109
domain: N
Appears in sequences
- Recip transform of 2*(1 + x^3)-1/(1-x).at n=9A049151
- Expansion of (1 - 2x)/(1 - 2x - x^2 - x^3 + 2x^4).at n=14A052974
- Number of partitions of n of order n.at n=71A074761
- Positive numbers y such that y^2 is of the form x^2+(x+119)^2 with integer x.at n=35A156650
- a(n) = (2*n^3 + 5*n^2 - 5*n)/2.at n=33A162265
- Numbers n such that m=(n^2+1)/2, p=(m^2+1)/2 and q=(p^2+1)/2 are all prime.at n=22A188546
- Number of n X 4 0..1 arrays with rows, antidiagonals and columns unimodal.at n=5A223633
- Number of nX6 0..1 arrays with rows, antidiagonals and columns unimodal.at n=3A223635
- T(n,k)=Number of nXk 0..1 arrays with rows, antidiagonals and columns unimodal.at n=39A223637
- T(n,k)=Number of nXk 0..1 arrays with rows, antidiagonals and columns unimodal.at n=41A223637
- Concatenation of n-th nonprime and n-th prime.at n=28A253911
- a(n) = a(n-1) + a(n-2) + a([(n+1)/2]), where a(0) = 1, a(1) = 1, a(2) = 1.at n=21A298348